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4 years ago

Look at the picture can someone pls help me By the way this class his career exploration’s

Physics

2 answers:

miskamm [114]4 years ago

4 0

Answer:m

Ramiro: Technology

Bradford: Education

Dinah: Agriculture

Zella: Architecture

Percy: Business

Explanation:

STatiana [176]4 years ago

4 0

1. News reporter : business
2.high school librarian : education and training
3. Farmer: agricultural
4. Carpenter: architecture and construction
5. Receptionist: Arts, A/V technology

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A 20.6 g marble sliding to the right at 59.6 cm/s overtakes and collides elastically with a 10.3 g marble moving in the same dir

Likurg_2 [28]

Answer:29.8 cm/s

Explanation:

Given

mass of marble A is $m_a=20.6\ gm$

Initial velocity of marble A is $u_a=59.6\ cm/s$

mass of marble B is $m_b=10.3\ gm$

Initial velocity of marble B $u_b=14.9\ cm/s$

After collision marble B moves with velocity of $v_b=74.5\ cm/s$

Conserving momentum

$m_au_a+m_bu_b=m_av_a+m_bv_b$

$20.6\times 59.6+10.3\times 14.9=20.6\times v_a+10.3\times 74.5$

$v_a=\frac{20.6\times 59.6-10.3(74.5-14.9)}{20.6}$

$v_a=29.8\ cm/s$

4 0

4 years ago

A 2 kg block is pushed by an external force against a spring with spring constant 131 N/m until the spring is compressed by 2.1

Andrej [43]

Answer:

d = 19.92 m

Explanation:

As in this exercise there is friction we must use the relationship between work and energy

W = ΔEm

Look for energy in two points

Initial. Fully compressed spring

Em₀ = $K_{e}$ = ½ k x²

Final. When the block stopped

$Em_{f}$ = 0

Let's look for the work of the rubbing force

W = fr d cos θ

Since rubbing is always contrary to movement, θ = 180

W = - fr d

Let's use Newton's second Law, to find the force of friction

Y Axis

N- w = 0

N = mg

The equation for the force of friction is

fr = μ N

fr = μ mg

We substitute in the work equation

W = - μ m g d

We write the relationship of work and energy

-μ m g d = 0 - ½ k x²

d = ½ k x² / μ m g

Let's calculate

d = ½ 131 2.1 2 / (0.74 2 9.8)

d = 19.92 m

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4 years ago

Two pulses are moving along a string. One pulse is

raketka [301]

Answer:

The answer is the 3rd option!

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3 years ago

Increase of green house gases, due to human activity, is warming the oceans. This causes changes in climate. Name three Earth sp

miskamm [114]

The three earth spheres which interact in this process are THE ATMOSPHERE, THE HYDROSPHERE AND THE BIOSPHERE.
The increase in the green house gases is destroying the ozone layers of the atmosphere, this makes it possible for more ultraviolet rays to penetrate through the atmosphere unto the earth surface. The increased temperature provided by these rays is warming up the oceans and this in turn is affecting the animals and the plants that reside in the oceans and those that depend on them. These chains of activities is changing the climate of the world and is affecting all the living things that live on the earth surface.

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3 years ago

A skier starts from rest and accelerates down a slope 2 at 23 m/s^2. How much time required for the skier to reach a speed of 9.

gayaneshka [121]

The skier's speed at time t is

v = (23 m/s²) t

To reach a speed of 9.3 m/s, the skier would need

9.3 m/s = (23 m/s²) t

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t ≈ 0.404 s

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3 years ago